Introduction

This page provides a comprehensive analysis of the known insider trading history of Michael Stuart Rosenthal. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

See Highest Ranking Insiders
Companies with Reported Insider Positions

The SEC filings indicate Michael Stuart Rosenthal has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:MP / MP Materials Corp. Chief Operating Officer 1,284,409
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Michael Stuart Rosenthal. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Trading History

This table shows the complete list of insider trades made by Michael Stuart Rosenthal as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change		 Share
Price		 Tran
Value		 Remaining
Value
2025-08-29 2025-08-29 4 MP MP Materials Corp. / DE
Common Stock 		S - Sale -14,063 1,284,409 -1.08 73.23 -1,029,833 94,057,271
2025-08-29 2025-08-29 4 MP MP Materials Corp. / DE
Common Stock 		S - Sale -52,063 1,298,472 -3.85 72.56 -3,777,691 94,217,128
2025-08-29 2025-08-29 4 MP MP Materials Corp. / DE
Common Stock 		S - Sale -83,874 1,350,535 -5.85 71.48 -5,995,314 96,536,242
2025-03-18 2025-03-16 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -384 1,434,409 -0.03 26.83 -10,303 38,485,193
2025-01-14 2025-01-13 4 MP MP Materials Corp. / DE
Common Stock 		A - Award 47,363 1,434,793 3.41
2025-01-14 2025-01-13 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -2,560 1,387,430 -0.18 19.53 -49,997 27,096,508
2025-01-14 2025-01-12 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -10,601 1,389,990 -0.76 19.75 -209,370 27,452,302
2024-12-11 2024-12-10 4 MP MP Materials Corp. / DE
Common Stock 		J - Other 169,078 1,400,591 13.73
2024-11-18 2024-11-17 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -171,462 1,231,513 -12.22 18.28 -3,134,325 22,512,058
2024-08-08 2024-08-06 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 30,000 1,402,975 2.19 10.84 325,200 15,208,249
2024-02-20 2024-02-17 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -171,462 1,372,975 -11.10 16.55 -2,837,696 22,722,736
2024-01-16 2024-01-12 4 MP MP Materials Corp. / DE
Common Stock 		A - Award 77,158 1,544,437 5.26
2023-05-31 2023-05-31 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 5,000 126,622 4.11 20.69 103,450 2,619,809
2023-05-31 2023-05-30 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 6,000 121,622 5.19 21.14 126,840 2,571,089
2023-05-31 2023-05-26 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 7,000 115,622 6.44 21.63 151,410 2,500,904
2023-05-25 2023-05-25 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 5,000 39,476 14.50 22.22 111,100 877,157
2023-05-23 2023-05-23 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 5,000 34,476 16.96 22.03 110,150 759,506
2023-05-22 2023-05-19 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 10,000 24,476 69.08 21.21 212,100 519,136
2023-05-22 2023-05-22 4 MP MP Materials Corp. / DE
Common Stock 		P - Purchase 5,000 29,476 20.43 21.78 108,900 641,987
2023-05-18 2023-05-18 4 MP MP Materials Corp. / DE
Common Stock 		J - Other 354,705 1,467,279 31.88
2023-03-17 2023-03-16 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -345 1,112,574 -0.03 27.62 -9,529 30,729,294
2023-02-17 2023-02-17 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -154,116 1,112,919 -12.16 32.69 -5,038,052 36,381,322
2023-01-17 2023-01-13 4 MP MP Materials Corp. / DE
Class A Common Stock 		A - Award 18,625 1,267,035 1.49
2022-03-17 2022-03-16 4 MP MP Materials Corp. / DE
Class A Common Stock 		F - Taxes -362 1,248,410 -0.03 43.95 -15,910 54,867,620
2022-02-18 2022-02-17 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -322,918 1,248,772 -20.55 41.60 -13,433,389 51,948,915
2022-01-18 2022-01-14 4 MP MP Materials Corp. / DE
Common Stock 		F - Taxes -2,075 1,571,690 -0.13 46.83 -97,172 73,602,243
2022-01-18 2022-01-14 4 MP MP Materials Corp. / DE
Common Stock 		A - Award 6,000 1,573,765 0.38
2021-03-17 2021-03-15 4 MP MP Materials Corp. / DE
Class A Common Stock 		F - Taxes -829 1,567,765 -0.05 45.98 -38,117 72,085,835
2021-03-17 2021-03-15 4 MP MP Materials Corp. / DE
Class A Common Stock 		A - Award 2,794 1,568,594 0.18
2021-03-17 2021-03-15 4 MP MP Materials Corp. / DE
Class A Common Stock 		A - Award 2,794 1,568,594 0.18
2020-11-19 2020-11-17 4 MP MP Materials Corp. / DE
Class A Common Stock 		A - Award 1,563,006 1,563,006
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)